docs: def _combine_season_stats(self, table_rows, career_stats, all_stats_dict):
          """
          Combine all stats for each season.
  
          Since all of the stats are spread across multiple tables, they should
          be combined into a single field which can be used to easily query stats
          at once.
  
          Parameters
          ----------
          table_rows : generator
              A generator where each element is a row in a stats table.
          career_stats : generator
              A generator where each element is a row in the footer of a stats
              table. Career stats are kept in the footer, hence the usage.
          all_stats_dict : dictionary
              A dictionary of all stats separated by season where each key is the
              season ``string``, such as '2017', and the value is a
              ``dictionary`` with a ``string`` of 'data' and ``string``
              containing all of the data.
  
          Returns
          -------
          dictionary
              Returns an updated version of the passed all_stats_dict which
              includes more metrics from the provided table.
          """
          most_recent_season = self._most_recent_season
          if not table_rows:
              table_rows = []
          for row in table_rows:
              season = self._parse_season(row)
              try:
                  all_stats_dict[season]['data'] += str(row)
              except KeyError:
                  all_stats_dict[season] = {'data': str(row)}
              most_recent_season = season
          self._most_recent_season = most_recent_season
          if not career_stats:
              return all_stats_dict
          try:
              all_stats_dict['Career']['data'] += str(next(career_stats))
          except KeyError:
              try:
                  all_stats_dict['Career'] = {'data': str(next(career_stats))}
              # Occurs when the player doesn't have any career stats listed on
              # their page in error.
              except StopIteration:
                  return all_stats_dict
          return all_stats_dict